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tpm: fix checks for policy digest existence in tpm2_seal_trusted()

Selaa lähdekoodia 
In my original patch sealing with policy was done with dynamically
allocated buffer that I changed later into an array so the checks in
tpm2-cmd.c became invalid. This patch fixes the issue.

Fixes: 5beb0c435b ("keys, trusted: seal with a TPM2 authorization policy")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Acked-by: Peter Huewe <peterhuewe@gmx.de>
This commit is contained in:
Jarkko Sakkinen
2016-01-06 16:43:30 +02:00
vanhempi e5be990c2f
commit f3c82ade7c
3 muutettua tiedostoa jossa 10 lisäystä ja 15 poistoa
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12
drivers/char/tpm/tpm2-cmd.c
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@@ -478,20 +478,16 @@ int tpm2_seal_trusted(struct tpm_chip *chip,
tpm_buf_append_u8(&buf, payload->migratable);
/* public */
if (options->policydigest)
tpm_buf_append_u16(&buf, 14 + options->digest_len);
else
tpm_buf_append_u16(&buf, 14);
tpm_buf_append_u16(&buf, 14 + options->policydigest_len);
tpm_buf_append_u16(&buf, TPM2_ALG_KEYEDHASH);
tpm_buf_append_u16(&buf, hash);
/* policy */
if (options->policydigest) {
if (options->policydigest_len) {
tpm_buf_append_u32(&buf, 0);
tpm_buf_append_u16(&buf, options->digest_len);
tpm_buf_append_u16(&buf, options->policydigest_len);
tpm_buf_append(&buf, options->policydigest,
options->digest_len);
options->policydigest_len);
} else {
tpm_buf_append_u32(&buf, TPM2_ATTR_USER_WITH_AUTH);
tpm_buf_append_u16(&buf, 0);